#!/usr/bin/env python
#
#       Orders.py
#       
#       Copyright 2009 Ben Davis <its.hip@gmail.com>
#       
#       This program is free software; you can redistribute it and/or modify
#       it under the terms of the GNU General Public License as published by
#       the Free Software Foundation; either version 2 of the License, or
#       (at your option) any later version.
#       
#       This program is distributed in the hope that it will be useful,
#       but WITHOUT ANY WARRANTY; without even the implied warranty of
#       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#       GNU General Public License for more details.
#       
#       You should have received a copy of the GNU General Public License
#       along with this program; if not, write to the Free Software
#       Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
#       MA 02110-1301, USA.

class Order(object):
    """Base-class for order"""
    def apply(self):
        pass
    
    def revert(self):
        pass
        
class Move(Order):
    """Move forward one square"""
    def apply(self):
        self.ship.queue.append((self.ship.move, 1))
    
    def revert(self):
        self.ship.queue.append((self.ship.move, 1))
        
class Rotate(Order):
    """Rotate 45 degrees.
    
    -1 turns port, 1 turns starboard"""
    def apply(self):
        self.ship.queue.append((self.ship.rotate, self.direction))
    
    def revert(self):
        self.ship.queue.append((self.ship.rotate, -self.direction))
    
class Orders(list):
    """List to store orders"""
    def apply(self):
        for order in self:
            order.apply()

    def revert(self):
        for order in self:
            order.revert()
